BS EN IEC 61756-1:2020
$167.15
Fibre optic interconnecting devices and passive components. Interface standard for fibre management systems – General and guidance
| Published By | Publication Date | Number of Pages |
| BSI | 2020 | 38 |
This part of IEC 61756 covers general information on fibre management system interfaces. It includes the definitions and rules under which a fibre management system interface is created and it provides also criteria to identify the minimum bending radius for stored fibres.
This document allows both single-mode and multimode fibre to be used.
Liquid, gas or dust sealing requirements at the cable entry area or cable element ending are not covered in this document.
PDF Catalog
| PDF Pages | PDF Title |
|---|---|
| 2 | undefined |
| 5 | Annex ZA(normative)Normative references to international publicationswith their corresponding European publications |
| 8 | English CONTENTS |
| 10 | FOREWORD |
| 12 | 1 Scope 2 Normative references 3 Terms and definitions |
| 13 | Figures Figure 1 – Multiple element management system |
| 14 | Figure 2 – Single circuit management system Figure 3– Single element management system |
| 17 | Figure 4– Patchcord Figure 5– Pigtail |
| 18 | 4 Abbreviated terms |
| 19 | 5 Description of a fibre management system Figure 6 – Functional parts diagram of a protective housing |
| 20 | 6 Parts and functions of a fibre management system 6.1 General Figure 7 – Functional parts diagram of FMS |
| 21 | 6.2 Splice trays |
| 22 | 6.3 Minimum bending radius for stored fibres |
| 23 | Figure 8 – Typical required failure probabilities of various networks |
| 24 | Figure 9 – Lifetimes per bent fibre metre versus failure probability for various bending radii |
| 25 | 6.4 Splice protector Figure 10 – Flow chart for minimum bending radius of stored fibres |
| 26 | 6.5 Splice holder Figure 11 – F type splice protector Figure 12– S type splice protector Figure 13 – M type fibre splice Tables Table 1 – Optical fibre fusion splice protectors – Outline and nominal dimensions Table 2 – Mechanical fibre splices – Outline and nominal dimensions |
| 27 | 6.6 Guiding elements |
| 28 | 6.7 Patchcords and pigtails 6.8 Identification of fibres, fibre tubes or single elements 7 Other factors relevant to fibre management systems 7.1 Re-entry and access 7.2 Quality of mouldings 7.3 Polymer materials 7.4 Marked or colour coded parts |
| 29 | Annex A (informative) Use of flow chart for calculation of the minimum bending radius for stored fibres A.1 Example of calculation minimum bending radius Figure A.1 – Step 1: Find radius that matches the failure probability target requirement |
| 30 | Figure A.2 – Find bending radius for specified failure probability target and fibre length |
| 31 | Figure A.3 – Step 2: Estimate the maximum attenuation increase for bending radius Figure A.4 – Estimated maximum attenuation increase for bending radius of 15 mm |
| 32 | Figure A.5 – Step 3: Compare estimated maximum attenuation with requirement |
| 33 | Figure A.6 – Estimated attenuation increase for bending radius of 20 mm |
| 34 | A.2 Results for various fibre types with a 1 m storage length Figure A.7 – Step 5: Check the estimated attenuation with requested maximum limit |
| 35 | A.3 Results for various fibre types with 2 m storage length Figure A.8 – Estimated maximum attenuation increase for bending radius Table A.1 – Minimum bending radius for storage of the various fibre types with typical mechanical failure probability targets for different network locations and fibre storage length of 1 metre and maximum attenuation increase of 0,05 dB at 1 625 nm |
| 36 | Table A.2 – Minimum storage radius for the various fibre types with typical mechanical failure probability targets for different network locations and fibre storage length of 2 metres and maximum allowed attenuation increase of 0,1 dB at 1 550 nm |
| 37 | Bibliography |
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BS EN IEC 61756-1:2020
Fibre optic interconnecting devices and passive components. Interface standard for fibre management systems – General…
